A new political poll shows support for National at its highest point in close to a year.

The latest ONE News Colmar Brunton poll has National up 5 per cent since late November, at 49 per cent.

The rise comes at the expense of both Labour, down 2 per cent to 33 per cent, and the Greens, down 2 per cent to 11 per cent.

Today's poll is also good news for John Key personally, with 44 per cent in the poll naming him as preferred Prime Minister, up 5 per cent from November.

Labour leader David Shearer was steady at 15 per cent while New Zealand First leader dropping 1 per cent to 5 per cent.

Last week a poll by Roy Morgan found that Labour and the Greens, polling 34.5 per cent and 13.5 per cent respectively, would be in the box seat to form a Government if the numbers remained unchanged on election day, although they would need support from some of the minor parties.

The Roy Morgan poll had National on 44 per cent, down 2 per cent on the previous fortnightly poll, while New Zealand First dropped 1 per cent to 4 per cent, below the current thresholds for seats under MMP.

A spokeswoman for Key said the result reflected a strong start to year for the Government.

‘‘It also shows we’ve got a positive agenda for New Zealand and people can see that we’re focused on the issues that matter.’’

The poll was not all positive for the Government though, with almost 60 per cent of the 1000 eligible voters who took part saying Key had made the wrong decision to keep Hekia Parata as Education Minister.

The poll asked questions of 1000 eligible voters, and has a margin of error of 3.1 per cent.